fix: resolve RedisCache array offset error and improve discovery diagnostics

- Fix RedisCache driver to handle MGET failures gracefully with fallback
- Add comprehensive discovery context comparison debug tools
- Identify root cause: WEB context discovery missing 166 items vs CLI
- WEB context missing RequestFactory class entirely (52 vs 69 commands)
- Improved exception handling with detailed binding diagnostics

deployment/infrastructure/roles/nginx-proxy/tasks/validation.yml

@@ -0,0 +1,37 @@
+---
+# Validation and Service Management for Nginx
+
+- name: Test nginx configuration
+  command: nginx -t
+  register: nginx_test
+  changed_when: false
+  tags:
+    - nginx
+    - validation
+
+- name: Display nginx test results
+  debug:
+    msg: "Nginx configuration test: {{ 'PASSED' if nginx_test.rc == 0 else 'FAILED' }}"
+  tags:
+    - nginx
+    - validation
+
+- name: Start and enable nginx service
+  systemd:
+    name: nginx
+    state: started
+    enabled: true
+    daemon_reload: true
+  tags:
+    - nginx
+    - service
+
+- name: Wait for nginx to be ready
+  wait_for:
+    port: 80
+    host: "{{ ansible_default_ipv4.address | default('127.0.0.1') }}"
+    delay: 2
+    timeout: 30
+  tags:
+    - nginx
+    - validation